▎ 摘　　要

NOVELTY - Recycling waste water in preparation of graphene comprises (i) filtering produced graphene by membrane to obtain discharged graphene acidic waste water A, (ii) treating obtained graphene acidic wastewater obtained by acid washing process, (iii) adjusting the pH, and leaching graphene particles to obtain a recycled solution containing graphene, (iv) diluting the raw strong acidic wastewater for 3-4 times, adjusting pH to be about 4-5, (v) adjusting tank after adjusting, (vi) by adjusting the strong acid wastewater treated by adjusting tank, and (vii) degrading and decomposing and mineralizing by semiconductor strong ionization, photo-catalytic action to generate electrochemical reaction, by electric flocculation, hydroxy free radical, and precipitating graphene in the waste water at the bottom of the container, processing, converting liquid from original sauce color to visual clear and transparent. USE - The method is useful for recycling waste water in preparation of graphene, which is useful in optical, electrical, mechanical, micro-nano processing, energy, biomedicine and medicine delivery. ADVANTAGE - The method reduces discharge of industrial waste water, and is green and environmentally friendly, solves problem of processing the ink waste water and waste acid graphene can recycle and reuse, saves water resource, low consumption, energy-saving, and emission-reducing, resource recycling environmentally friendly carbon double carbon target, and is economical. DESCRIPTION OF DRAWING(S) - The drawing shows a process flow chart illustrating the method for recycling waste water in preparation of graphene (Drawing includes non-English language text).